Re: [6.2 regression][bisected]discard storm on idle since v6.1-rc8-59-g63a7cb130718 discard=async

Linux regression tracking #update (Thorsten Leemhuis)
2023-04-21T13:56:09Z

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On 02.03.23 09:04, Linux regression tracking #adding (Thorsten Leemhuis)
wrote:
> On 01.03.23 20:30, Sergei Trofimovich wrote:
>>
>> Tl;DR:
>>
>> After 63a7cb13071842 "btrfs: auto enable discard=async when possible" I
>> see constant DISCARD storm towards my NVME device be it idle or not.
>>
>> No storm: v6.1 and older
>> Has storm: v6.2 and newer
>
> Thanks for the report. To be sure the issue doesn't fall through the
> cracks unnoticed, I'm adding it to regzbot, the Linux kernel regression
> tracking bot:
>
> #regzbot ^introduced 63a7cb13071842
> #regzbot title btrfs: DISCARD storm towards NVME device be it idle or not
> #regzbot ignore-activity

FWIW, the fix is in next now, regzbot just missed it due to a url
encoding bug:

#regzbot monitor:
https://lore.kernel.org/linux-btrfs/cover.1680723651.git.boris@bur.io/T/#m21c1856ccc8fd24ccb6fbad7d9b54f0bae115d25
#regzbot fix: 2e55571fddf
#regzbot ignore-activity

Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat)
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